U.S. national annual (Jan-Dec) precipitation (inches)
based on the U.S. HCN data set
1999 value preliminary
    year   precip
    1900    33.96
    1901    30.07
    1902    31.89
    1903    31.24
    1904    28.56
    1905    34.08
    1906    33.53
    1907    32.37
    1908    30.58
    1909    32.53
    1910    25.99
    1911    30.77
    1912    33.09
    1913    31.59
    1914    29.91
    1915    33.60
    1916    30.67
    1917    25.98
    1918    30.37
    1919    34.29
    1920    32.46
    1921    29.37
    1922    32.30
    1923    31.84
    1924    29.18
    1925    28.43
    1926    33.14
    1927    32.40
    1928    32.31
    1929    32.41
    1930    27.81
    1931    29.66
    1932    32.83
    1933    29.63
    1934    27.91
    1935    31.35
    1936    30.47
    1937    32.06
    1938    30.93
    1939    28.44
    1940    32.25
    1941    33.64
    1942    32.93
    1943    29.07
    1944    31.93
    1945    34.14
    1946    32.39
    1947    32.14
    1948    32.70
    1949    31.65
    1950    31.43
    1951    31.76
    1952    28.51
    1953    31.48
    1954    29.01
    1955    28.42
    1956    26.44
    1957    34.34
    1958    33.31
    1959    34.09
    1960    30.95
    1961    31.62
    1962    29.11
    1963    27.81
    1964    31.83
    1965    31.05
    1966    30.01
    1967    30.91
    1968    31.02
    1969    33.33
    1970    31.50
    1971    31.81
    1972    33.46
    1973    36.21
    1974    31.58
    1975    34.33
    1976    28.84
    1977    32.19
    1978    31.82
    1979    34.59
    1980    30.66
    1981    30.99
    1982    35.13
    1983    37.69
    1984    32.19
    1985    32.10
    1986    32.82
    1987    31.34
    1988    28.47
    1989    30.78
    1990    32.94
    1991    35.44
    1992    33.89
    1993    33.57
    1994    32.93
    1995    33.96
    1996    35.66
    1997    33.04
    1998    35.18
    1999    29.93